package com.ruoyi.framework.config;

import com.ruoyi.framework.config.properties.PermitAllUrlProperties;
import com.ruoyi.framework.security.filter.JwtAuthenticationTokenFilter;
import com.ruoyi.framework.security.handle.AuthenticationEntryPointImpl;
import com.ruoyi.framework.security.handle.LogoutSuccessHandlerImpl;
import jakarta.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.ProviderManager;
import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.annotation.web.configurers.HeadersConfigurer;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.security.web.servlet.util.matcher.MvcRequestMatcher;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.handler.HandlerMappingIntrospector;

import java.util.ArrayList;
import java.util.List;

/**
 * spring security配置
 *
 * @author ruoyi
 */
@Configuration
@EnableWebSecurity
public class SecurityConfig {
    /**
     * 自定义用户认证逻辑
     */
    @Autowired
    private UserDetailsService userDetailsService;

    /**
     * 认证失败处理类
     */
    @Autowired
    private AuthenticationEntryPointImpl unauthorizedHandler;

    /**
     * 退出处理类
     */
    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandler;

    /**
     * token认证过滤器
     */
    @Autowired
    private JwtAuthenticationTokenFilter authenticationTokenFilter;

    /**
     * 跨域过滤器
     */
    @Autowired
    private CorsFilter corsFilter;

    /**
     * 允许匿名访问的地址
     */
    @Autowired
    private PermitAllUrlProperties permitAllUrl;

    @Resource
    private HandlerMappingIntrospector introspector;

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }


    @Bean
    public AuthenticationProvider authenticationProvider() {
        DaoAuthenticationProvider authenticationProvider = new DaoAuthenticationProvider();
        authenticationProvider.setUserDetailsService(userDetailsService);
        authenticationProvider.setPasswordEncoder(bCryptPasswordEncoder());
        authenticationProvider.setHideUserNotFoundExceptions(false);
        return authenticationProvider;
    }

    @Bean
    public AuthenticationManager authenticationManager() {
        return new ProviderManager(authenticationProvider());

    }

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Bean
    protected SecurityFilterChain filterChain(HttpSecurity httpSecurity) throws Exception {
        // 注解标记允许匿名访问的url
        // ExpressionUrlAuthorizationConfigurer<HttpSecurity>.ExpressionInterceptUrlRegistry registry = httpSecurity.authorizeRequests();
        //permitAllUrl.getUrls().forEach(url -> registry.requestMatchers(url).permitAll());

        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf(AbstractHttpConfigurer::disable)
                // 禁用HTTP响应标头
                .headers(headers -> headers.cacheControl(HeadersConfigurer.CacheControlConfig::disable).frameOptions(HeadersConfigurer.FrameOptionsConfig::disable))
                // 认证失败处理类
                .exceptionHandling(exceptionHandler -> exceptionHandler.authenticationEntryPoint(unauthorizedHandler))
                // 基于token，所以不需要session
                .sessionManagement(sessionManagement -> sessionManagement.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                // 过滤请求
                .authorizeHttpRequests(e -> e

                        .requestMatchers(createMvcReqMatcher()).permitAll()
                        // 静态资源，可匿名访问
                        .requestMatchers(createAntPathReqMatcher()).permitAll()
                        // 除上面外的所有请求全部需要鉴权认证
                        .anyRequest().authenticated()
                );
        // 添加Logout filter
        httpSecurity.logout(logoutHandler -> logoutHandler.logoutUrl("/logout").logoutSuccessHandler(logoutSuccessHandler));
        // 添加JWT filter
        httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        // 添加CORS filter
        httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
        httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
        return httpSecurity.build();
    }

    /**
     * mvc请求，即controller中的请求
     *
     * @return mvc请求（发送到controller的请求）
     */
    private MvcRequestMatcher[] createMvcReqMatcher() {
        List<MvcRequestMatcher> mvcRequestMatchers = new ArrayList<>();

        // 对于登录login 注册register 验证码captchaImage 允许匿名访问
        mvcRequestMatchers.add(new MvcRequestMatcher(introspector, "/login"));
        mvcRequestMatchers.add(new MvcRequestMatcher(introspector, "/register"));
        mvcRequestMatchers.add(new MvcRequestMatcher(introspector, "/captchaImage"));
        // 注解标记允许匿名访问的url
        for (String url : permitAllUrl.getUrls()) {
            mvcRequestMatchers.add(new MvcRequestMatcher(introspector, url));
        }

        return mvcRequestMatchers.toArray(MvcRequestMatcher[]::new);
    }

    /**
     * 可匿名访问的静态资源 非Spring MVC端点请求， 需要特别指明，否则springboot无法启动
     *
     * @return 非Spring MVC端点请求集合
     */
    private AntPathRequestMatcher[] createAntPathReqMatcher() {
        return new AntPathRequestMatcher[]{
                AntPathRequestMatcher.antMatcher(HttpMethod.GET, "/"),
                AntPathRequestMatcher.antMatcher(HttpMethod.GET, "/*.html"),
                AntPathRequestMatcher.antMatcher(HttpMethod.GET, "/**/*.html"),
                AntPathRequestMatcher.antMatcher(HttpMethod.GET, "/**/*.css"),
                AntPathRequestMatcher.antMatcher(HttpMethod.GET, "/**/*.js"),
                AntPathRequestMatcher.antMatcher(HttpMethod.GET, "/profile/**"),

                AntPathRequestMatcher.antMatcher("/swagger-ui.html"),
                AntPathRequestMatcher.antMatcher("/swagger-resources/**"),
                AntPathRequestMatcher.antMatcher("/webjars/**"),
                AntPathRequestMatcher.antMatcher("/*/api-docs"),
                AntPathRequestMatcher.antMatcher("/*/api-docs/**"),
                AntPathRequestMatcher.antMatcher("/druid/**"),
                AntPathRequestMatcher.antMatcher("/doc.html")
        };
    }
}
